TY - JFULL
AU - R. Sarathi and G. Nagesh and K. Vasudevan
PY - 2008/4/
TI - Classification of Discharges Initiated by Liquid Droplet on Insulation Material under AC Voltages Adopting UHF Technique
T2 - International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering
SP - 33
EP - 39
EM - rsarathi@iitm.ac.in
VL - 2
SN - 1307-6892
UR - http://waset.org/publications/10641
PU - World Academy of Science, Engineering and Technology
NX - International Science Index 15, 2008
N2 - In the present work, an attempt has been made to
understand the feasibility of using UHF technique for identification
of any corona discharges/ arcing in insulating material due to water
droplets. The sensors of broadband type are useful for identification
of such discharges. It is realised that arcing initiated by liquid droplet
radiates UHF signals in the entire bandwidth up to 2 GHz. The
frequency content of the UHF signal generated due to corona/arcing
is not much varied in epoxy nanocomposites with different weight
percentage of clay content. The exfoliated/intercalated properties
were analysed through TEM studies. It is realized that corona
initiated discharges are of intermittent process. The hydrophobicity
of the material characterized through contact angle measurement. It
is realized that low Wt % of nanoclay content in epoxy resin reduces
the surface carbonization due to arcing/corona discharges. The results
of the study with gamma irradiated specimen indicates that contact
angle, discharge inception time and evaporation time of the liquid are
much lower than the virgin epoxy nanocomposite material.
ER -